drivers/cpu/cpu-uclass.c

   1 /*
   2  * Copyright (C) 2015 Google, Inc
   3  * Written by Simon Glass <sjg@chromium.org>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <cpu.h>
  10 #include <dm.h>
  11 #include <errno.h>
  12 #include <dm/lists.h>
  13 #include <dm/root.h>
  14
  15 DECLARE_GLOBAL_DATA_PTR;
  16
  17 int cpu_get_desc(struct udevice *dev, char *buf, int size)
  18 {
  19         struct cpu_ops *ops = cpu_get_ops(dev);
  20
  21         if (!ops->get_desc)
  22                 return -ENOSYS;
  23
  24         return ops->get_desc(dev, buf, size);
  25 }
  26
  27 int cpu_get_info(struct udevice *dev, struct cpu_info *info)
  28 {
  29         struct cpu_ops *ops = cpu_get_ops(dev);
  30
  31         if (!ops->get_info)
  32                 return -ENOSYS;
  33
  34         return ops->get_info(dev, info);
  35 }
  36
  37 int cpu_get_count(struct udevice *dev)
  38 {
  39         struct cpu_ops *ops = cpu_get_ops(dev);
  40
  41         if (!ops->get_count)
  42                 return -ENOSYS;
  43
  44         return ops->get_count(dev);
  45 }
  46
  47 U_BOOT_DRIVER(cpu_bus) = {
  48         .name   = "cpu_bus",
  49         .id     = UCLASS_SIMPLE_BUS,
  50         .per_child_platdata_auto_alloc_size = sizeof(struct cpu_platdata),
  51 };
  52
  53 static int uclass_cpu_init(struct uclass *uc)
  54 {
  55         struct udevice *dev;
  56         int node;
  57         int ret;
  58
  59         node = fdt_path_offset(gd->fdt_blob, "/cpus");
  60         if (node < 0)
  61                 return 0;
  62
  63         ret = device_bind_driver_to_node(dm_root(), "cpu_bus", "cpus", node,
  64                                          &dev);
  65
  66         return ret;
  67 }
  68
  69 UCLASS_DRIVER(cpu) = {
  70         .id             = UCLASS_CPU,
  71         .name           = "cpu",
  72         .flags          = DM_UC_FLAG_SEQ_ALIAS,
  73         .init           = uclass_cpu_init,
  74 };